1021742039 has 2 divisors, whose sum is σ = 1021742040. Its totient is φ = 1021742038.

The previous prime is 1021741991. The next prime is 1021742053. The reversal of 1021742039 is 9302471201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021742039 - 2²⁰ = 1020693463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021742089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510871019 + 510871020.

It is an arithmetic number, because the mean of its divisors is an integer number (510871020).

Almost surely, 2^1021742039 is an apocalyptic number.

1021742039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021742039 is an equidigital number, since it uses as much as digits as its factorization.

1021742039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1021742039 is about 31964.6998890964. The cubic root of 1021742039 is about 1007.1954476858.

The spelling of 1021742039 in words is "one billion, twenty-one million, seven hundred forty-two thousand, thirty-nine".